The occurrance of exogenous disease is not only influenced by the effect of seasonal exogenous pathogenic factors, but also related with the micro-ecology balance of respiratory tract on human body.
外感病发病与否除时令外邪的致病因素外，还与人体上呼吸道微生态平衡相关；
Seasonal diseases in the spring is related with the balance of micro-ecology on the upper respiratory tract.
春季时令病邪致病与上呼吸道微生态平衡与否相关；
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